catena-Poly[[lead(II)-μ-N′-[1-(pyridin-2-yl-κN)ethyl­idene]isonicotino­hydrazidato-κ(3) N′,O:N (1)] perchlorate]

The Pb(II) atom in the polymeric title compound, {[Pb(C(13)H(11)N(4)O)]ClO(4)}(n), is coordinated by the N′-[1-(pyridin-2-yl-κN)ethyl­idene]isonicotinohydrazidate ligand via its O,N,N′-donors and simultaneously bridged by a neighbouring ligand via the pyridin-2-yl N atom. The resultant supra­molecular chain is a zigzag along the a axis. The stereochemistry of the Pb(II) atom is defined by an N(3)OE donor set (E = lone pair of electrons), which results in a Ψ-trigonal–bipyramidal coordination with the O and pyridin-2-yl N atoms in axial positions. The dihedral angle between the pyridine rings of the ligand is 6.3 (3)°. The supra­molecular cationic chains are linked into a three-dimensional array via secondary Pb⋯O [3.133 (6) and 3.28 (7) Å] and Pb⋯N [3.028 (4) Å] inter­actions. Weak C—H⋯O inter­actions and aromatic π–π stacking [centroid–centroid separation = 3.693 (2) Å] also occur in the crystal.